US Bridges

CR 306 over Panther Creek Slough

Fair

Coleman County, Texas · 1.55 MI W of FM 1026 · Structure no. 230420AA0279001

Built
1932
93 years old
Condition
Fair
inspected January 2023
Type
Culvert
Masonry
Length
39 ft
4 main spans
Daily traffic
147
2020 count
Owner
County
County Highway Agency

About this bridge

CR 306 over Panther Creek Slough is a masonry culvert carrying CR 306 over Panther Creek Slough in Coleman County, Texas. It was built in 1932, so it is 93 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 147 vehicles a day, projected to reach 70 by 2033. The structure is 39 ft (11.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 306
CrossesPanther Creek Slough
Location1.55 MI W of FM 1026
RouteCounty Highway 306
CountyColeman County
StateTexas
Coordinates31.55514, -99.51684
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialMasonry
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span8 ft (2.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic147 (2020)
Projected traffic70 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 306 over Panther Creek Slough built?

It was built in 1932, making it 93 years old in 2025.

What condition is CR 306 over Panther Creek Slough in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2023.

How much traffic does CR 306 over Panther Creek Slough carry?

About 147 vehicles per day (2020 count).

How long is CR 306 over Panther Creek Slough?

The structure is 39 ft (11.9 m) long with a longest span of 8 ft (2.4 m) and a deck 26 ft wide.

Who owns CR 306 over Panther Creek Slough?

It is owned by the County Highway Agency.